[libc-commits] [libc] [libc][docs] adds macro handling, POSIX status, and validation to docgen (PR #89421)

[Michael Flanders via libc-commits]

Flandini wrote:

> Thanks @enh-google ! @Flandini let's use `POSIX.1-2017` then? When 2024 edition is published, we can update this field name.

sounds good. effectively reverted the old revert with new commit [ad1a583](https://github.com/llvm/llvm-project/pull/89421/commits/ad1a5838b6519674aa1bf5e504946cd950878bc5) and switched to POSIX.1-2017.

https://github.com/llvm/llvm-project/pull/89421